$5

@JapanVacation + Honey

Honey is a shopping extension for your browser that has a variety of useful functions. It can search for coupons, tell you if the price is higher or lower than normal on an item, and track prices for you. It's a great idea to check the price history of an item before purchasing to see if it's gone up or down in the preceding 3 months. It also offers cash back at some retailers in the form of Honey Gold, which you can redeem for gift cards. The real secret tech is the gift card purchase feature though - sometimes Honey offers discounted gift cards at different stores and you can save 8 or 9% off the purchase price at checkout. Awesome feature, super useful extension.